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DIY cheap Functiongenerator from Audio Amplifier

Hoofdcategorie: experiments Categorie: Trillingen/Frequentie Gepubliceerd: vrijdag 24 november 2023
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In the video, you see one of my first attempts to build a diy tonegenerator. A few days later, giving it another try, my amplifier seems te have died of unknown reasons. I guess my electromotor absorbed to much energy. I inform you so you can try to prevent from this error. Bluetooth is still working, but no speaker-signal coming out anymore. No fuse to repace... I got stuck!!! I think I ruined my Renkforce Amplifier. Which is a pity because my tonegenerator really seemd to work very very nice!

I bought another Renkforce: it didn't work at all. A third one: same story. I need to try another amplifier now. I know now the idea behind my diy tonegenerator works like a charm for Meldes experiment, but my Renkforce (very poor reviews) amplifier does not.

Later I choose two different amplifiers from another trademark that both work well now. I decided to continu using the KEMO because the Whadda you have to solder all components yourself (which is not that bad job to do, but I will have to do it 16 times).

audio versterkers

To complete my amplifier setup, I will purchase following:

  • a box to build the whole set in
  • a doublesided jackplug 3,5 mm
  • jackplug female 3.5 mm for fixation on box
  • DC brushmotor ± 1,5 V (low voltage)
  • Potmeter 10 kΩ (I choose/gambled a cheap one that can pass enough power 0,6 W)
  • 2 bananaplug to connect powersupply to my box

I allready tested these amplifiers. But I am writing this before purchasing the completing set and before kids have touched this equipment. So it has not been fully tested yet.

audio versterkers onderdelen



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Doel wil docenten, TOA's en leerlingen natuurkunde inspireren. is een verzameling Natuur­kunde Experimenten. Elk experiment, simpel of gecompliceerd, verdient aandacht.

Vind je mijn initiatief positief en heb je een suggesties? Graag!!! Ik sta altijd open voor nieuwe ideeën, voor verbeteringen en aanvullingen.

Je collega-TOA Lennart



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